Foxboro FX-130F-N4 Product Description
Product Overview
The Foxboro FX-130F-N4 is a high-performance pneumatic indicating controller from the iconic Foxboro 130 Series, engineered for dense control room installations and precise closed-loop process regulation. Designed with a vertical scale and large pointer for superior visibility, it combines local manual operation with remote pneumatic setpoint adjustment, making it ideal for critical processes where both on-site intervention and centralized control are required. Its modular, serviceable design allows for maintenance without process shutdown, while rugged construction ensures long-term stability in harsh industrial environments. As a core member of the 130 Series, the FX-130F-N4 is a field-proven solution for oil and gas, chemical, power, and other process industries demanding reliable, high-accuracy pneumatic control.
Basic Information
Manufacturer: Foxboro (Invensys, now Schneider Electric)
Model: FX-130F-N4 (also referenced as 130F-N4)
Product Type: Pneumatic Indicating Controller, Process Control Station
Applicable System: Foxboro 130 Series Pneumatic Control Systems; compatible with standard 3–15 psi pneumatic signals
Mounting Style: Panel-mounted in high-density control room racks; vertical installation
Protection Rating: IP20 (front panel); sealed enclosure for internal components
Certifications: CE compliant; meets industrial pneumatic control standards for process environments
Signal Range: Standard 3–15 psi (0.2–1.0 bar) pneumatic input/output
Power Supply: Instrument air (20–100 psi clean, dry air)
Operating Temperature: 0°C to +60°C (standard); -20°C to +70°C (optional extended range)
Storage Temperature: -40°C to +85°C
Relative Humidity: 5% to 95% non-condensing
Weight: Approximately 1.2 kg
Dimensions: 300 mm (H) × 80 mm (W) × 150 mm (D)
Country of Origin: United States
Function and Positioning
The FX-130F-N4 serves as a versatile local/remote pneumatic control hub for process plants, positioned to deliver accurate, intuitive control of pressure, temperature, flow, and level variables in pneumatic-based automation systems. Its defining feature is the remote/local switch, which allows operators to toggle between manual setpoint adjustment (local mode) and pneumatic setpoint drive from a central controller (remote mode)—a critical capability for balancing on-site responsiveness and centralized process management. The controller provides continuous, full-scale indication of process variables via a high-visibility vertical scale and large pointer, enabling quick, error-free reading from a distance. It supports proportional, proportional-integral (PI), or proportional-integral-derivative (PID) control algorithms, with adjustable gain and reset rates to match diverse process dynamics. A key design advantage is its modular, removable control unit, which can be replaced or serviced without disrupting the process loop, minimizing downtime. As a bridge between field transmitters and final control elements (e.g., control valves), the FX-130F-N4 ensures stable, bumpless transfer between auto and manual modes, enhancing process safety and operational flexibility.
Core Performance Parameters
Control Modes: Proportional (P), Proportional-Integral (PI), Proportional-Integral-Derivative (PID)
Signal Compatibility: 3–15 psi (0.2–1.0 bar) pneumatic input/output; setpoint tracking in remote mode
Setpoint Adjustment: Manual (local) via knob; remote (pneumatic) via 3–15 psi signal
Measurement Accuracy: ±0.5% of full scale
Repeatability: ±0.1% of full scale
Scale Range: Customizable (standard ranges for pressure, temperature, flow, level)
Display: Vertical transparent scale; large, high-contrast pointer; continuous variable indication
Bumpless Transfer: Seamless auto/manual switching without process upset
Control Output: 3–15 psi pneumatic signal to final control elements
Air Consumption: ≤0.5 scfh (standard cubic feet per hour) at steady state
Vibration Resistance: Compliant with ISA S71.04 G2 standards for control room environments
Diagnostics: Visual indication of setpoint, process variable, and deviation; no electrical power required
General Adaptable Accessories
Mounting Hardware: High-density rack mounting brackets, panel cutout templates, vibration isolation mounts
Scale Plates: Custom engraved scale plates for pressure, temperature, flow, level, and other process variables
Pneumatic Accessories: Filter-regulator units (3–15 psi output), stainless steel tubing, compression fittings, air supply manifolds
Replacement Parts: Pointer assemblies, scale covers, manual adjustment knobs, remote/local switch modules, control algorithm cartridges
Protection Kits: Dust covers for front panel, environmental sealing gaskets, surge protection for pneumatic signals
Compatibility Accessories: Foxboro 130M/130P series controller components, pneumatic signal splitters, setpoint signal repeaters
Applicable Equipment and Fields
The FX-130F-N4 is designed for process industries relying on pneumatic control systems, requiring high-accuracy local/remote regulation and clear operator visibility. Key sectors include oil and gas (refineries, petrochemical plants, natural gas processing), thermal power generation, chemical manufacturing, pulp and paper, water and wastewater treatment, pharmaceuticals, metals and mining, and food and beverage. It is ideal for controlling critical variables such as boiler pressure, reactor temperature, distillation column level, and process flow. The FX-130F-N4’s rugged pneumatic design (no electrical components), high-visibility display, bumpless transfer, and serviceable modular construction make it the preferred controller for legacy pneumatic system upgrades, new plant installations, and hazardous areas where electrical devices are restricted.
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